Granite obelisk used to designate one of the end points of the baseline measured by Alexander Dallas Bache on Dauphin Island in 1847

Granite obelisk used to designate one of the end points of the baseline measured by Alexander Dallas Bache on Dauphin Island in 1847. This granite marker is now in Ft. Gaines at the entrance to Mobile Bay. Although moved from its original location, it is the oldest known Coast Survey marker on the Gulf Coast.

Photo Location: Alabama, Dauphin Island